How brains benefit from meditation

How brains benefit from meditation

  10:05:00 AM    Science Lover

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Experienced meditators seem to be able switch off areas of the brain associated with daydreaming as well as psychiatric disorders such as autism and schizophrenia, according to a new brain imaging study by Yale researchers.

Experienced meditators seem to switch off areas of the brain
associated with wandering thoughts, anxiety and some
psychiatric disorders such as schizophrenia. Researchers
used fMRI scans to determine how the brains of meditators
differed from subjects who were not meditating. The areas
shaded in blue highlight areas of decreased activity in the
brains of meditators. Credit: courtesy of yale

Meditation's ability to help people stay focused on the moment has been associated with increased happiness levels, said Judson A. Brewer, assistant professor of psychiatry and lead author of the study published the week of Nov. 21 in the Proceedings of the National Academy of Sciences. Understanding how meditation works will aid investigation into a host of diseases, he said.

"Meditation has been shown to help in variety of health problems, such as helping people quit smoking, cope with cancer, and even prevent psoriasis," Brewer said.

The Yale team conducted functional magnetic resonance imaging scans on both experienced and novice meditators as they practiced three different meditation techniques.

They found that experienced meditators had decreased activity in areas of the brain called the default mode network, which has been implicated in lapses of attention and disorders such as anxiety, attention deficit and hyperactivity disorder, and even the buildup of beta amyloid plaques in Alzheimer's disease. The decrease in activity in this network, consisting of the medial prefrontal and posterior cingulate cortex, was seen in experienced meditators regardless of the type of meditation they were doing.

The scans also showed that when the default mode network was active, brain regions associated with self-monitoring and cognitive control were co-activated in experienced meditators but not novices. This may indicate that meditators are constantly monitoring and suppressing the emergence of "me" thoughts, or mind-wandering. In pathological forms, these states are associated with diseases such as autism and schizophrenia.

The meditators did this both during meditation, and also when just resting — not being told to do anything in particular. This may indicate that meditators have developed a "new" default mode in which there is more present-centered awareness, and less "self"-centered, say the researchers. "Meditation's ability to help people stay in the moment has been part of philosophical and contemplative practices for thousands of years," Brewer said. "Conversely, the hallmarks of many forms of mental illness is a preoccupation with one's own thoughts, a condition meditation seems to affect. This gives us some nice cues as to the neural mechanisms of how it might be working clinically."

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Meditation Beats Dance for Harmonizing Body and Mind

Meditation Beats Dance for Harmonizing Body and Mind

  8:32:00 PM    Science Lover

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The body is a dancer's instrument, but is it attuned to the mind? A new study from the University of California, Berkeley, suggests that professional ballet and modern dancers are not as emotionally in sync with their bodies as are people who regularly practice meditation.

UC Berkeley researchers tracked how closely the emotions of seasoned meditators and professional dancers followed bodily changes such as breathing and heart rates.

They found that dancers who devote enormous time and effort to developing awareness of and precise control over their muscles -- a theme coincidentally raised in the new ballet movie "Black Swan" -- do not have a stronger mind-body connection than do most other people.

By contrast, veteran practitioners of Vipassana or mindfulness meditation -- a technique focused on observing breathing, heartbeat, thoughts and feelings without judgment -- showed the closest mind-body bond, according to the study recently published in the journal Emotion.


"We all talk about our emotions as if they are intimately connected to our bodies -- such as the 'heartache of sadness' and 'bursting a blood vessel' in anger," said Robert Levenson, a UC Berkeley psychology professor and senior author of the study. "We sought to precisely measure how close that connection was, and found it was stronger for meditators."

The results offer new clues in the mystery of the mind-body connection. Previous studies have linked the dissociation of mind and body to various medical and psychiatric diseases.

"Ever have the experience of getting home from work and realizing you have a blistering headache?" said Jocelyn Sze, a doctoral student in clinical science at UC Berkeley and the lead author of the study. "The headache probably built up throughout the day, but you might have been intentionally ignoring it and convincing yourself that you felt fine so that you could get through the demands of the day."

Increasingly, mindfulness meditation is being used to treat physical and psychological problems, researchers point out. "We believe that some of these health benefits derive from meditation's capacity to increase the association between mind and body in emotion," Levenson said.

For the experiment, the researchers recruited volunteers from meditation and dance centers around the San Francisco Bay Area and via Craigslist. The study sample consisted of 21 dancers with at least two years of training in modern dance or ballet and 21 seasoned meditators with at least two years of Vipassana practice. A third "control group" was made up of 21 moderately active adults with no training in dance, meditation, Pilates or professional sports.

Participants, who ranged in age from 18 to 40, were wired with electrodes to measure their bodily responses while they watched emotionally charged scenes from movies and used a rating dial to indicate how they were feeling.

Although all participants reported similar emotional reactions to the film clips, meditators showed stronger correlations between the emotions they reported feeling and the speed of their heartbeats. Surprisingly, the differences between dancers and the control group were minimal.

Researchers theorize that dancers learn to shift focus between time, music, space, and muscles and achieve heightened awareness of their muscle tone, body alignment and posture.

"These are all very helpful for becoming a better dancer, but they do not tighten the links between mind and body in emotion," Levenson said.

By contrast, meditators practice attending to "visceral" body sensations, which makes them more attuned to internal organs such as the heart. "These types of visceral sensations are a primary focus of Vipassana meditation, which is typically done sitting still and paying attention to internal sensations," Sze said.

The study was published in the December 2010 issue of Emotion. In addition to Sze and Levenson, coauthors are UC Berkeley psychologists Joyce W. Yuan and Anett Gyurak, who is currently a postdoctoral fellow at Stanford University.

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